/*
	function randomPics() originally written by Theresa B. Kim for the Department of Psychology
	reference: UW Library Website source code (collage javascript written by Chris Gray)
*/
function randomPics() {
	
	// number of pictures to be displayed randomly (pictures are to be named 'psych#.jpg" 
	// where # is the picture id starting from 0
	var numPics = 7;
	
	// generates a random picture id
	var number = Math.round(Math.random()*(numPics-1));
	
	// writes the code for displaying the collage
	document.write('<img src="images/psych' + String(number) + '.jpg" alt="Department of Psychology banner" width="789" height="165" />');
}